217988889712 has 30 divisors (see below), whose sum is σ = 464239772864. Its totient is φ = 99085858080.

The previous prime is 217988889697. The next prime is 217988889757.

217988889712 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56296848 + ... + 56300719.

Almost surely, 2^217988889712 is an apocalyptic number.

217988889712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

217988889712 is an abundant number, since it is smaller than the sum of its proper divisors (246250883152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217988889712 is a wasteful number, since it uses less digits than its factorization.

217988889712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112597597 (or 112597580 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 70.

The spelling of 217988889712 in words is "two hundred seventeen billion, nine hundred eighty-eight million, eight hundred eighty-nine thousand, seven hundred twelve".